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Thread: Ceiling fan tripping earth leakage.

  1. #11
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    Quote Originally Posted by Derlyn View Post
    Hi All

    A bit of feedback.

    Meggered the motor. Result infinity.

    Connected the fan in my workshop and tested.

    Turned it on and off a couple of times ..... no problem.
    Left it running for an hour. When I turned it off, the earth leakage tripped.

    While the motor was still warm, I meggered it again and found the reading to be lower than when the motor was cold. 1,5 megs.

    The insulation resistance is reducing with an increase in temperature.

    I am aware that the earth leakage should only start tripping when the insulation resistance is approx 8k or lower, but I suppose the reduction in insulation resistance combined with the arc from the switch does something that causes enough current to earth to trip the earth leakage.

    I still don't fully understand the theory behind it, but I now know that it's the fan that's faulty.

    Derek
    Until you actually find the fault... you will never know....how does the saying go... clutching at straws.

    something to consider...the motor turns...its hanging on a shaft... wiring gets warm (even if it doesnt get warm)...as the motor stops...the wiring shorts on the frame ...e/l trips...i would bet money on the neutral being the cause of problem.

    The wires are always squashed through the tubes and out through a hole into a connector block... do you have a leakage current clamp?

    if not...hang the fan ...connect the insulation resistance tester set to 1000 volts ...shake the bottom of the fan and see if the reading drops while doing this.

  2. #12
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    Quote Originally Posted by Derlyn View Post
    Hi All

    A bit of feedback.

    Meggered the motor. Result infinity.

    Connected the fan in my workshop and tested.

    Turned it on and off a couple of times ..... no problem.
    Left it running for an hour. When I turned it off, the earth leakage tripped.

    While the motor was still warm, I meggered it again and found the reading to be lower than when the motor was cold. 1,5 megs.

    The insulation resistance is reducing with an increase in temperature.

    I am aware that the earth leakage should only start tripping when the insulation resistance is approx 8k or lower, but I suppose the reduction in insulation resistance combined with the arc from the switch does something that causes enough current to earth to trip the earth leakage.

    I still don't fully understand the theory behind it, but I now know that it's the fan that's faulty.

    Derek
    This is why i always said , "electricity is a mix of science and magic"

  3. #13
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    Hello, There

    Ceiling fan tripping earth leakage may be it is happen due to the poor wiring or also due to the earthing problem in house. One of the simplest grounding problems to fix is making sure that all ground connections are correct.

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